55140464 has 20 divisors (see below), whose sum is σ = 108431304. Its totient is φ = 27158208.

The previous prime is 55140461. The next prime is 55140467. The reversal of 55140464 is 46404155.

It is an interprime number because it is at equal distance from previous prime (55140461) and next prime (55140467).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55140461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24647 + ... + 26790.

Almost surely, 2^55140464 is an apocalyptic number.

It is an amenable number.

55140464 is a deficient number, since it is larger than the sum of its proper divisors (53290840).

55140464 is a wasteful number, since it uses less digits than its factorization.

55140464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51512 (or 51506 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 55140464 is about 7425.6625293640. The cubic root of 55140464 is about 380.6187150546.

The spelling of 55140464 in words is "fifty-five million, one hundred forty thousand, four hundred sixty-four".